<!DOCTYPE html>
<html lang="en">
<head>
    <meta http-equiv="Content-Type"content="text/html; charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <form action="/login" method="post">
        <p>用户名：<input name="username" value=""></p>
        <p>密码：<input name="password" type="password"></p>
        <button type="submit" name="submit">登录</button>
    </form>
</body>
</html>